Solutions By Sensor Type: Pressure Schaevitz

®

Bonded foil strain gage (BFSG) industrial pressure transducers by Measurement Specialties are designed for extreme industrial environments:The key feature of the Schaevitz® BFSG pressure transducer is the overloadprotection for the diaphragm and sensing element called the over-travel-stop(OTS). OTS gives the Schaevitz bonded foil a minimum of five times overrange pressure rating without damage or drift. This protection allows the BFSG transducer to achieve maximum resolution at the targeted pressure range with minimal noise from amplification gain as compared with competitor product that would need to be ranged higher to accommodate overpressure spikes.The principle of the transducer is a force-summing diaphragm coupled via aforce rod (pushrod) to a strain-gaged double cantilever beam with integralisolation flexures, forming a four-arm Wheatstone bridge in a verysymmetrical manner.This design lends itselfto a stiff system withhigh long-term stability.This structure alsoprovides the benefits ofthermal isolation from high temperature transients,shock loads and vibration. This fact has been essentialin military and aerospace applications where the bonded foil OTS structure has been the only product to meet long-term stability requirements without degradation or failure.

Bonded FoilStrain Gage Transducers

•high overpressure•high cycle fatigue•high vibration and shock•high temperature•nuclear power radiation•high RF immunity Successful applications for theSchaevitz® bonded foil pressure transducers include: •Steel andaluminum mills•Power plants•Pulp/papermills•Mining anddrillingapplications•Water treatmentfacilities•Corrosive fluid tanks•Sub-sea applications like oil wells•Military, aerospace control systems•Breweries, pharmaceuticals andfood processing plants

ModelP100P300P700P900P981 Rolling MillP9000Subsea Control Module

Package/Housing Stainless steel, media- isolated, foil strain gage Stainless steel, media-isolated, foil strain gage Stainless steel, media-isolated, foil strain gage Stainless steel, media-isolated, foil strain gage Stainless steel, media-isolated, foil strain gage Stainless steel, media-isolated, foil strain gage Stainless steel, media-isolated, foil strain gage

Type

Absolute, vented or gageAbsolute, vented or gageAbsolute, vented or gageAbsolute, vented or gageSealed gageAbsolute, vented or gageAbsolute, vented or gage Large flat flush diaphragm,rugged stainless steelconstruction, high burstpressure limitLarge flat flush diaphragm,rugged stainless steel construction, high burst pressure limitLow and high level output,rugged stainless steelconstruction, high burst pressure limit, integral shunt calibrationOperational in high temperatureswith high overload capability and shock and vibration resistanceDigitally compensated unitwith a proprietary fatigue enhanced diaphragm to handle a high number of pressure cyclesDigitally compensated intrinsicallysafe strain gage pressure transducer Rugged construction, highoverload protection, field proven design with excellentstability and reliability

UniqueFeature

<+/-0.25% F.R.O.<+/-0.15% F.R.O.<+/-0.25% F.R.O.High range: <+/-0.10% F.R.O.Medium range: <+/-0.20% F.R.O.<+/-0.18% F.R.O.<+/- 0.08% F.R.O.<+/-0.25% F.R.O.

Accuracy(F.R.O.) EMI/RFI

CE certifiedCE certifiedCE certifiedCE certifiedCE certifiedCE certifiedCE certified

PressureRanges (psi)

0-10, 75, 100, 150, 200,250, 3500-75, 100, 150, 220, 350, 500,750, 1000, 1500, 2200, 2900,3500, 5000, 7500, 10,0000-75, 100, 150, 220, 350, 500,750, 1000, 1500, 2200, 2900, 3500, 5000, 7500, 10,0000-75, 100, 150, 200, 250, 350,500, 750, 1000, 1500, 2200,3500, 5000, 7500, 10,0000-1500, 2200, 2500, 3500,5000, 7500, 10,0000-75, 100, 150, 200, 250, 350,500, 750, 1000, 1500, 2200, 2500, 3500, 5000, 7500, 10,0000-1500, 2200, 2500, 3500,5000, 7500, 10,000, 20,000 Overpressure >5X full range>5X full range>5X full range>5X full range>5X full range>5X full range>5X full range Compensated : 10ºC to80ºC Operational: -54ºCto 120ºCCompensated : -20ºC to 80ºCOperational: -54ºC to 120ºCCompensated : -20ºC to 80ºCOperational: -54ºC to 120ºCCompensated : 0ºC to 100ºCOperational: -54ºC to 120ºCCompensated : 0ºC to 100ºCOperational: -54ºC to 120ºCCompensated : -20ºC to 80ºCOperational: -40ºC to 100ºCCompensated : -20ºC to 80ºCOperational: -40ºC to 120ºC OperatingTemp Range (C) Ship ballast tanks, cargotanks, inert gas sensingPharmaceuticals, food anddairy processing, brewing industry, liquid tank contentsHydraulic pressure monitoring,torpedo depth sensing, vehicle brake system monitoring, military and commercial aircraftHydraulic pressure monitoring,torpedo depth sensing, vehiclebrake system monitoring,military and commercial aircraftRolling mills - steel andaluminumHydraulic and pneumatic controls,steel and aluminum rolling mills, pulp and paper mills, automotive test stands, power generation, off- shore oil explorationSubsea oil exploration, controlmodule and solenoid controlvalve All materials compatiblewith 17-4 pH stainless steel, Inconel 625All materials compatible with17-4 pH stainless steel, Inconel 625All materials compatible with17-4 pH stainless steelAll materials compatible with17-4 pH stainless steelAll materials compatible with17-4 pH stainless steelAll materials compatible with 17-4pH stainless steelAll materials compatible with17-4 pH stainless steel TypicalApplications Media

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